mutus (dumb): elinguis (deprived of the faculty of speech; e.g., from fear). To render anybody speechless, aliquem elinguem reddere; alicui usum linguae auferre (of a thing; Ov., Met., 14, 99): to be or become speechless, elinguem esse; linguae usu defectum esse: I am or become speechless, vox me deficit; aliquid mihi vocem intercludit or praecludit (anything deprives me of the power of utterance). Speechless from amazement, stupidus.